21261779

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{14533}}^1$

素因数の和:14570

約数の個数: 16

約数和(自身を含む): 27905280

約数和(自身を除く): 6643501

約数列:

[1, 7, 11, 19, 77, 133, 209, 1463, 14533, 101731, 159863, 276127, 1119041, 1932889, 3037397, 21261779]

約数ペア:

[(1, 21261779), (7, 3037397), (11, 1932889), (19, 1119041), (77, 276127), (133, 159863), (209, 101731), (1463, 14533)]